Length of Alimony

Married 19 yrs, 2 teenage children. I am the wage earner although spouse has an advanced degree, refuses to work. Currently in the process of setting up the seperation agreement an have visited your alimony calculator but it does not advise on the length of time I should propose to pay alimony. Do you have a recommendation for proposed length of time to pay alimony? I am considerably older than my spouse and have much less time to earn, is this taken into consideration?

Duration of alimony is typically half the length and the amount is based on a number of factors including the standard of living during marriage, the ability of a spouse to pay, etc.

The amount and duration of alimony is based on 16 factors. If retirement is approaching, that could certainly be taken into consideration.